It seems in Lausanne Otto "played" with the jauge wind while Lavillenie was ready to jump, moving it.
So Lavillenie did a very clear sign to Otto with only one finger (second photo)http://www.sport365.fr/autres-sports/at ... 9971.shtml
While this is definitely not stylish, I was wondering what was the risk for Otto ?
I guess nothing, but may be some people know more about the rules.
I suppose in high jump and pole vault, one may annoy his opponents as much as they like.